Screw-lock and slot-filler.



F. SCHUMANN.

SCREW LOCK AND SLOT FILLER.

APPLICATION FILED NOV. 24, I914.

Patented Ee]b.26,1918.

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FRIED SGHUMANIT, BROOKLYN, NEW YORK.

SCREW-LOCK AND SLOT-FILLER.

Specification of Letters Patent.

Application filed November 24, 191a Serial No. erases.

To all whom it may concern:

Be it known that I, FRED SCHUMANlN, a

citizen of the United States, residing in Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Screw-Lock and Slot-Filler, of which the following is aspecification.

My presentjnvention relates to an improvement in slot-fillers for screwsand the like wherein the head thereof is slotted and more especiallyrelates to use in conjunction with wood screwsof the well known yp Insome uses to which screws are put, the slot. is usually necessary forthe insertion of a screwdriver or like tool for applying the screw. Thisslotted head is rather unsightly especially where slotted head screwsonly are utilized forholding ornamental panels and the like.

The important advantage of my device is that after the screw has beenapplied, the filler may be driven into the slot thereof, thereby fillingthe slot and making the screw fastemn means of a more sightly appearancean at the same time making it very dificult to extract the screwthereafter.

Another important feature of my device is that it prevents the backingout of the screw by vibration, or through the shrinkage of the wood inwhich it may be placed owing to the action of the locking point on thefiller as well as filling up the slot in such a manner as makingdifficult the removal by the customary screw-driver.

In the drawing, Figure 1 is a perspective transparent view of ascrew-lock and slot-filler, as the same appears when in lookingposition, on the upper portion of a screw, of rounded or button-headform; Fig. 2 is a side view of the complete-screw and lock in lockingposition partially in section, one side of the head, shank, and slotbeing broken away; Fig. 3 is a top view in detail removed from the screwof the slotfiller and lock-member; and Fig. 4 is a like side-viewthereof.

To form my improved screw-lock, etc, I take a screw of anysuitablerordinary form, the shape of the head being immaterial, but ineach case the slot-filler head is of such form as to fill completely,and fit snugly in the drive-slot of the screw-head. The screw shownherein is of what is commonly known as the rounded or buttonhead form ofwood-screw 2, 2 Through this screw beginning at or adjacent to thecenter of the drive-slot of the screw-head, I drill diagonally downwardand outward through the screw-shank 2, a bore hole 11, preferably,

but not necessarily, in the plane of the driveslot of the screw head 1,in which snugly fits the slot-filler disk 9 of the same exterior contouras the head having the diagonal preferably sharp-pointed securing prong10 formed integral therewith, or firmly secured to the bottom plane facethereof angular to such bottom plane face, in such manner that when theslot-filler disk 9 is driven down into position in the drive-slot, suchprong 10 will be forced down and out through the bore 11 in such manneras to lock the screw against rotation.

It is evident that many changes and modifications in the construction ofmy invention may be made without departing from the scope thereof; and'Ido not intend to limit myself to, the exact construction shown.

I claim:

1. In combination with a screw having a screw-slot and an openingextending downwardly from the base of the screw-slot through the shankof the screw at an angle to the base of the screw-slot in the planethereof; of a slot-filler having a disk member corresponding to thedimensions of the screw-slot to accurately fill the same; and a prongextending downwardly from said disk member at an angle thereto to extendthrough the inclined opening of said screwshank in the plane of thedisk.

2. In combination with a screw having a screw-slot and an openingextending down wardly from the base of the screw-slot through the shankof the screw at an angle to the base of the screw-slot, of a slot-fillerhaving a disk member corresponding to the dimensions of the screw-slotto accurately fill the same, and a prong extending downwardly from saiddisk member at an angle thereto to extend through the inclined openingof said screw-shank.

FRED SCHUMANN.

Witnesses: 7

Fnno. J. Donn, if. F. V. Cnmsrornnn.

